Valve for internal-combustion engines.



W. E. TAFT.

VALVE FOB INTERNAL COMBUSTION ENGINES.

APPLICATION FILED APR. 8, 1912.

Patented Nov) 3, 1914 EFF %lnvent0r M5,

' U/ztnesses M a? MW.

" NORRIS PETERS 60.. PHOTO-LITHU.. WASHINGTON, D. C,

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VALVE ron INTERNAL-COMBUSTION ENGINES.

T 0 all whom it may concern Be it known that I, l/VALTER E. TAr'r,citi-r zen of the United States,-res1d1ng at Provn" I valve that isguarded against the great pressure due to the explosion of the gas inthe cylinder of the engine, to eliminate carbonization, and providemeans for lessening the friction of the movement of the valve.

In the accompanying drawing: Figure 1 is a transverse section of thevalve and the valve chamber taken on the line 2. 2. of Fig. 2. Fig. 2 isa longitudinal section of the same taken on the line 1. 1. of Fig. 1.Fig. 3 is a perspective view of the lining for the valve chamber showingthe seat for the supplementary valve. Fig. l is a perspective view ofthe supplementary valve. Fig. 5 is a perspective view of the innervalve. Fig. 6 is a perspective view showing a modification of the innervalve. Fig. 7 is a perspective view showing another modification of theinner valve. Fig. 8 is a transverse section showing a fiat valve seat.

In the drawing, (4 represents the valve casing; 6 the reciprocatinginner valve; 0 the lining of the valve casing, and d the supplementaryvalve. The valve casing a is provided with the water passage 6 forcooling the said casing, and with the port f, which may constituteeither an inlet or an exhaust port as the case may be, and the lining 0of the valve casing is also provided with a port it, held in registerwith said port f. Between the said casing a, and the lining c, is placedthe supplementary valve (Z, which is connected for simultaneous movementwith the valve Z), by means of thepin j, which enters the hole 76, madein the supplementary valve, the said pin crossing from one of saidvalves to the other, through slot Z, of the lining c.

The valve 6 as shown in Fig. 1, is made tubular, with one side flattenedfor the action of the anti-friction rolls m, thereon, the anti-frictionrollers m, m, being backed by means of a shoe n, which is resilientlyheld in its bearing position against the said rollers by means of thespring 0, and the adjusting screw p. The supplementary valve cl servesto protect the spring-actuated inner Specification of Letters Patent.-Patented'Nov, 3, 1914,; Application filed April s, 1912. H Serial in).659,183. I

valve 5 from the effect of the excessive pressure of the explosion whenthe valve is closed. i I i A. modification of my invention is shown inFig. 6 in which the valve 7) is made tubular, with the axis of the borelocated at one side of the axis of the periphery, and having alongitudinal slot g made in the thinner side of the said tube,-Wherebythe said valve may be caused to yield resiliently to its originalcylindrical form when it has been outwardly or inwardly deflectedtherefrom.

A further modification of my invention is shown in Fig. 8, and inthiscase the lining is made flat for the seats and the valve 6 is fiaton the side that seats upon the flat valve seat. The supplementary valvealso is made flat.

I do not limit myself to the construction specified, asthe object of theinvention may be accomplished in various ways.

This invention is specific with respect to the broad invention explainedin my case 1 SerialNoQGSZlTG, filed March 29, 1912. It

differs from the specific invention therein used to illustrate suchbroad invention in this, among other things, that the inner valve ismovable lengthwise after the manner of a slide valve, instead of havinga rotary reciprocating or oscillating motion; and also in this, that theantifriction rollers are applied transversely instead of lengthwise ofthe valve.

I claim as my invention 1. A valve casing provided with a port for thepassage of the motive fluid, a lining for the said casing, alsoprovidedwith a port registering with the said port inthe casing, a cylindricalvalve within the said lining, a supplementary valve located at the outerside of the said lining and having its seat thereon and operativelyconnected with the said inner valve for simultaneous movement therewith,and operative means for impart ing a reciprocating sliding movement tothe said valves.

2. A valve, having a casing, a lining therein,and a tubular slide valvearranged in said casing, said casing, lining and valve havingcooperating ports, and a series'of antifriction rollers arrangedtransversely of the valve on its side opposite the ports, and a pressuredevice for holding said rollers in forcible contact with the valve.

3. A valve casing having a port therein,

a valve chamber a valve seat therein, a lining a reciprocating slidingmovement to said 19 ing covering said valve seat having a port valves.

registering With the said port in the valve In testimony whereof, Iafllxmy signature casing, a valve seating Within and upon said in thepresence of two Witnesses.

lining, a supplementary valve located at the outer side of the saidlining and having its WALTER TAFT' seat thereon and operativelyconnected With Witnesses:

the inner valve for simultaneous movement CHAS V. EDDY,

therewith, and operative means for impart- W. S. MARSH.

Copies of this patent may be obtained. for five cents each, byaddressing the Commissioner of Patents,

Washington, D. C.

